# Weatherly 620A - Type: Aircraft model (FAA registry) - Registry code: 9630603 - Manufacturer (registry): WEATHERLY AVIATION CO INC - Model: 620A - Aircraft type: Fixed wing single engine - Category: Airplane - Engines: 1 · Reciprocating - Seats: 1 - Weight class: Up to 12,499 lb - Certification: Type certificated - Data sheet: [TCDS A26WE](https://openairdocs.org/tcds/A26WE) (OpenAirDocs) - Holder: Weatherly Aircraft Company - Registered aircraft: 6 - Page: https://openairdocs.org/model/weatherly-620a Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker. ## ADs that may apply (OpenAirDocs) Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment. - [AD 2020-10-03](https://openairdocs.org/ad/2020-10-03): Wing Attach Hinge Fitting · Weatherly 201, 201A, 201B and 6 more. Effective Jun 15, 2020 - [AD 2016-07-11](https://openairdocs.org/ad/2016-07-11): Wing Attach Fittings · Weatherly 201, 201A, 201B and 6 more. Effective Apr 15, 2016 - [AD 96-16-06](https://openairdocs.org/ad/96-16-06): Wing Hinge Pin · Weatherly 620A and 620B. Effective Oct 6, 1996 ## Registered aircraft (6) - [N4627G](https://openairdocs.org/aircraft/N4627G): [Dunn Blake C](https://openairdocs.org/faa-owner/DUNN%20BLAKE%20C), [Bristol, CO](https://openairdocs.org/faa-place/CO/Bristol), built 1991, S/N 1532 - [N4628U](https://openairdocs.org/aircraft/N4628U): [Rons Air Service Inc](https://openairdocs.org/faa-owner/RONS%20AIR%20SERVICE%20INC), [Two Buttes, CO](https://openairdocs.org/faa-place/CO/Two%20Buttes), S/N 1530 - [N4640D](https://openairdocs.org/aircraft/N4640D): [Rons Air Service Inc](https://openairdocs.org/faa-owner/RONS%20AIR%20SERVICE%20INC), [Two Buttes, CO](https://openairdocs.org/faa-place/CO/Two%20Buttes), S/N 1531 - [N46455](https://openairdocs.org/aircraft/N46455): [Page Aerial Service Inc](https://openairdocs.org/faa-owner/PAGE%20AERIAL%20SERVICE%20INC), [Rochelle, IL](https://openairdocs.org/faa-place/IL/Rochelle), built 1991, S/N 1535 - [N4647E](https://openairdocs.org/aircraft/N4647E): [Foss And Meier Flight Service](https://openairdocs.org/faa-owner/FOSS%20AND%20MEIER%20FLIGHT%20SERVICE), [Devils Lake, ND](https://openairdocs.org/faa-place/ND/Devils%20Lake), S/N 1537 - [N4656M](https://openairdocs.org/aircraft/N4656M): [Hofer Perry L](https://openairdocs.org/faa-owner/HOFER%20PERRY%20L), [Doland, SD](https://openairdocs.org/faa-place/SD/Doland), built 1992, S/N 1540 ## NTSB investigations (5) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB CEN22LA340](https://openairdocs.org/ntsb/CEN22LA340), Jul 25, 2022: Weatherly 620A (N4651W), Stewart, MN, substantial damage. Probable cause: The pilot’s failure to maintain adequate clearance from crops during an agricultural flight. - [NTSB CEN15LA272](https://openairdocs.org/ntsb/CEN15LA272), Jun 14, 2015: Weatherly 620A (N4659N), Van Horn, TX, substantial damage. Probable cause: The loss of engine power for reasons that could not be determined based on the available information. - [NTSB CHI03LA254](https://openairdocs.org/ntsb/CHI03LA254), Aug 10, 2003: Weatherly 620A (N4656M), Doland, SD, substantial damage. Probable cause: The pilot's failure to maintain clearance from the wires and directional control not being possible due to the failure of the brake system. Factors contributing to the accident were the wires, the… - [NTSB CHI03LA134](https://openairdocs.org/ntsb/CHI03LA134), May 24, 2003: Weatherly 620A (N4650W), Melville, ND, substantial damage. Probable cause: The pilot's failure to maintain clearance from the wires. The low altitude operation and the wires were contributing factors. - [NTSB ATL92LA154](https://openairdocs.org/ntsb/ATL92LA154), Aug 9, 1992: Weatherly 620A (N4650W), Cobb, GA, substantial damage. Probable cause: THE CORRODED, AND SEPARATED, MAGNETIC CHIP DETECTOR PLUG WHICH ALLOWED THE LOSS OF ALL ENGINE OIL AND THE ENGINE'S SUBSEQUENT SEIZURE. FACTORS WERE THE INADEQUATE 100 HOUR INSPECTION, AND THE HIGH… ## FAA accident and incident reports (7) From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [Accident 20220725007809A](https://openairdocs.org/incident/20220725007809A), Jul 25, 2022: Weatherly Aviation Co Inc 620A (N4651W), Stewart, MN, Substantial damage. The pilot was on his fourth pass that morning spraying a field of corn. As he dropped in over top of a tree grove the main landing gear contacted the corn 250… - [Accident 20150614009869A](https://openairdocs.org/incident/20150614009869A), Jun 14, 2015: Weatherly Aviation Co Inc 620A (N4659N), Van Horn, TX, Destroyed. On June 14, 2015, at 11:25 a.m. central time, a Weatherly 620-A aircraft bearing registration number N4659N, registered to devil dusters inc., and leased to… - [Accident 20030810018639A](https://openairdocs.org/incident/20030810018639A), Aug 10, 2003: Wthrly 620A (N4656M), Doland, SD, Substantial damage. (-23) Mr. Hofer was doing an aerial application job one mile nw of the town of Doland, SD. He hit some power lines with his aircraft causing damage to the… - [Accident 20030522010909A](https://openairdocs.org/incident/20030522010909A), May 22, 2003: Wthrly 620A (N4650W), Melville, ND, Substantial damage. (-23) On 05/22/2003 at 1911 CDT, a weatherly, N4650W, owned by foss & meier flight service, devils lake, ND and flown by clemens r. meier was substantially… - [Incident 19990724025249I](https://openairdocs.org/incident/19990724025249I), Jul 24, 1999: Wthrly 620A (N4647G), Oneill, NE. (-23) Just after takeoff, aircraft experienced a wide power fluctuation and then loss of power. Operator banked the plane right, released the load of… - [Incident 19970726025449I](https://openairdocs.org/incident/19970726025449I), Jul 26, 1997: Wthrly 620 (N4650W), Orovada, NV, Minor damage. Failed clear wire on pullup from fpray run. Caught on spray pump. Broke a blade. Landed safely. - [Accident 19920809033189A](https://openairdocs.org/incident/19920809033189A), Aug 9, 1992: Wthrly 620 (N4650W), Cobb, GA, Substantial damage. Lost oil during spray runs. Engine seized. Nosed over landing. Chip detector plug came out causing oil loss. ## STCs that may be installed (OpenAirDocs) (30) Approved for this model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has. - [STC SA04652CH](https://openairdocs.org/stc/SA04652CH): To allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specification. Swift Fuels LLC - [STC SA7965SW](https://openairdocs.org/stc/SA7965SW): Application of fabric and polyurethane finishing system. Shady Aviation LLC - [STC SA01757WI](https://openairdocs.org/stc/SA01757WI): To allow the use of UL91 or UL94 (minimum) grade aviation fuel. Swift Fuels LLC - [STC SA01967WI](https://openairdocs.org/stc/SA01967WI): Use of GAMI G100UL High Octane Unleaded Avgas. General Aviation Modifications Inc - [STC SA01831WI](https://openairdocs.org/stc/SA01831WI): To allow the use of UL91 (minimum) grade aviation fuel. Petersen Aviation Inc - [STC SA02268CH](https://openairdocs.org/stc/SA02268CH): Installation of Airwolf Filter Corp. Air Oil Separator. Airwolf Filter Corporation - [STC SA5190NM](https://openairdocs.org/stc/SA5190NM): Installation of Gustin Aviation chip detector light system. A & L Aircraft Parts Inc - [STC SA6070NM](https://openairdocs.org/stc/SA6070NM): Installation of a 'quick-disconnect drain plug' on the engine rocker sump for the oil drain retrieval system after engine shutdown. West Coast Air Creations - [STC SA01282NY](https://openairdocs.org/stc/SA01282NY): Installation of Airwolf remote mounted engine oil filter kit AFC-K015 on aircraft powered by Pratt & Whitney radial reciprocating engine Series R-985, R-1340 and R-1830. Airwolf Filter Corporation - [STC SA2586NM](https://openairdocs.org/stc/SA2586NM): Installation of J.P. Instruments temperature monitoring systems. J P Instruments - [STC SA02283SE PAGE 2](https://openairdocs.org/stc/SA02283SE%20PAGE%202): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In Flight Data) CGR-30P. Electronics International Inc - [STC SA02402SE PAGE 2](https://openairdocs.org/stc/SA02402SE%20PAGE%202): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data) CGR-30C. Electronics International Inc - [STC SA2693NM](https://openairdocs.org/stc/SA2693NM): Installation of Electronics International digital volt/amp gauges and accessories. Electronics International Inc - [STC SA01988SE](https://openairdocs.org/stc/SA01988SE): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data) MVP-50P. Electronics International Inc - [STC SA00680SE](https://openairdocs.org/stc/SA00680SE): Installation of Electronics International model UBG-16 or UBG-16T bar graph engine analyzer. Electronics International - [STC SA01258SE](https://openairdocs.org/stc/SA01258SE): Installation of the Automatic Flagman Dispenser Models in accordance with Automatic Flagman Master Drawing Lists specified in attached AML, or later FAA approved revision.This STC supercedes several existing STC s as listed in the notes on the attached AML. R-S Sales Inc - [STC SA330NW](https://openairdocs.org/stc/SA330NW): Installation of automatic flagman model no 4. R-S Sales Inc - [STC SA02168AK](https://openairdocs.org/stc/SA02168AK): Installation of hourmeter airspeed switch. For unpressurized aircraft only. Pressurized aircraft must have pressurization system deactivated. Avalaska Inc - [STC SA2687NM](https://openairdocs.org/stc/SA2687NM): Installation of Truboplus/ Electronics Int'l gauges and switches. Aero Manufacturing Inc - [STC SA00458SE](https://openairdocs.org/stc/SA00458SE): Fabrication and installation of vortex generators mounted on wings. Aeronautical Testing Service Inc - [STC SA00444SE](https://openairdocs.org/stc/SA00444SE): Install vortex generators on wings. Micro AeroDynamics Inc - [STC SA00477WI](https://openairdocs.org/stc/SA00477WI): Installation of a Compro Driftfinder DFS-10 to system which injects oil into engine exhaust to produce smoke to determine wind speed and direction. Compro Aviation Inc - [STC SA5895NM](https://openairdocs.org/stc/SA5895NM): Installation of an air conditioner. Weatherly Aviation Company - [STC SA1626NM PAGE 2](https://openairdocs.org/stc/SA1626NM%20PAGE%202): Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series). Electronics International - [STC SA2350NM PAGE 2](https://openairdocs.org/stc/SA2350NM%20PAGE%202): Installation of Electronics International Inc digital carburetor/outside air temperature gauges. Electronics International - [STC SA4302NM](https://openairdocs.org/stc/SA4302NM): Installation of Electronics Int'l digital automatic engine analyzer. Electronics International - [STC SA2423SO](https://openairdocs.org/stc/SA2423SO): Installation of Chemical Evacuation System to remove residue from the agricultural spray dispersal system. Paul S Woods - [STC SA3862NM PAGE 2](https://openairdocs.org/stc/SA3862NM%20PAGE%202): Installation of Electronics International Primary TIT/EGT/CHT instruments, remote switches and associated accessories. Electronics International - [STC SA2190NM PAGE 2](https://openairdocs.org/stc/SA2190NM%20PAGE%202): Installation of electronics International Digital Volt/Amp Gauges and Accessories. Electronics International - [STC SA2350NM](https://openairdocs.org/stc/SA2350NM) (historical): Installation of Electronics International Inc digital carburetor/outside air temperature gauges listed on the attached continuation sheet and the associated accessories. Electronics International --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.